OpenVPN

https://openwrt.org/docs/guide-user/services/vpn/openvpn/server#key_management

VPN_PKI=”/etc/easy-rsa/pki” export EASYRSA_PKI=”${VPN_PKI}” export EASYRSA_CERT_EXPIRE=”36500” cp -p pki/private/.key /etc/openvpn/ cp -p pki/issued/.crt /etc/openvpn/ cp -p pki/{ca.crt,dh.pem} /etc/openvpn/

service openvpn restart